You did not use the site, Click here to remain logged. Timeout: 60 second

Constructing an Angle of 90 degrees

213 lượt xem
Xuất bản 09/08/2016
How to construct an angle of 90° (using just a straightedge and compass, without a protractor)? Find the answer in this video. Construction on paper. Video without words. Thanks to Rex Boggs, Rockhampton Grammar School, Australia ( ) for help with the English translation. Music by longzijun, . My math materials in English: . My (whole) website: .
geometry construction angle construct 90 degrees antonija horvatek matematika osnovna škola svijet matematike angle of 90° right angle right angle construction video without words